Suggest why helium can be used as a carrier gas but oxygen cannot.

Which of the following is a characteristic of a mixture? Definite composition Each substance in the mixture retains its own properties The different elements are chemically bonded together Elements are separated by a chemical change

How does bonding and antibonding molecular orbitals interaction stabilize Molecules?

What is formula of bauxite

Which of the following is considered a strong acid? a. HF b. HClO4 c. H3PO4 d. HC2H3O2

What does the R stand for in the ideal gas law (PV=nRT) ?

The unit cell of amazonite is made of three pairs of faces, each pair different from the others. The faces are oriented at angles to one another that are not 90 degrees.

An aqueous solution at 25∘C has a hydronium ion concentration of 3.2*10-9 M. What is the hydroxide ion concentration of the solution? Write your answer in scientific notation. Use the multiplication symbol rather than the letter x in your answer.

What is the electron configuration of a sulfur atom in the ground state?

Unsaturated fatty acids are often classified according to the number of carbon atoms between the terminal methyl carbon (the omega carbon) and the closest double bond to the methyl end of the chain.

Suppose the average concentration of copper in water is measured to be 2.5 x 10" M. a. Express this concentration in mg/L. b. Express this concentration in ug/L. c.